Once the state of Jin was bothered by the prevalence of thieves, and this plagued Marguis Jin.

有一段时间晋国盗贼横行，晋侯很为此事苦恼。

He was very happy when he heard that Zheng Yong could identify the thieves’ misdeeds just by observing their appearances. He was confident that in no time there would be no thieves any more.

当他得知郄雍能通过观察盗贼的面貌发现他们的罪行时，心中非常高兴，以为消灭全国的盗贼指日可待。

But Zhao Wenzi reminded him that this method could not put an end to theft in this country. Before long, the thieves killed Zheng Yong. Zhao Wenzi advised the Marguis and said, “If your Majesty wants to exterminate theft, and you should select virtuous and talented people, and entrust them with important posts. As long as everyone in the court is of fine breeding and the politics is clean and just, the populace will be influenced and good social custom can be formed. When people have a sense of honor, there will be no thief at all.”